234 Part II . SQL Essentials Figure 10-2 (My space web page)
234 Part II . SQL Essentials Figure 10-2 shows the output of the mysqladmin variables command on a server where both the BerkeleyDBand InnoDB tables enabled. Note Figure 10-2: The mysqladmin variables command on a server with both BerkeleyDB and InnoDB tables enabled MyISAM The default table type for tables created in MySQL is MyISAM. The MyISAM table type is an extension of the ISAM table type. The MyISAM table type will eventually replace the ISAMtable type. In a future version of MySQL, the ISAM table type will no longer be offered. MyISAM uses a B-tree index type and compresses indexes whenever possible. For string-based indexes such as those on CHARand VARCHAR columns, MyISAM tables space-compress the index. To use compressed numeric-based indexes add PACK_KEYS=1 in the process of creating the table. Tables can be damaged by a system crash, a crash of the MySQL server, or any number of unforeseen events. If queries fail to return complete results or other unexplained errors occur, the table may need repair. Corrupt or broken MyISAM tables can be repaired with the myisamchk command. Cross- Reference Chapter 13 shows how to repair broken tables and solve other MySQL problems. There are three table formats for MyISAM tables: . Static . Dynamic . Compressed
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